Portable air jet for paper machines



Oct. 4, 1927; 1,644,226}

F. BEDARD;

PORTABLE AIR JET FOR PAPER MAGHINES Filed Feb. 16. 1927* gwuento'oaid/"J en ines Ger. 4, i921.

siren srs'r ES -iii FRANK nnnnnn, or FLINT, micmoznv.

. -21 I PQR'lABLE AIR JET son FAPER, rwgkmns.

possible in connection with slow inov ing machines, but where themachines run at a speed of sevemhundred end fifty feet per minute, itwill readily be appreciated tint manual removal of the paper web is-impossible. Various devices have been used to accomplish the removal ofthe sticking] paper'web, but all of such devices have been ispermanently fixed to some portion of the machine, and capable of,operation atone ointonly. For instance, when the device is mounted toremove the Web vfrom the wire, as itis about to pass to the first press'20 rolls, it is impossible to remove the web when it adheres to thenext press rollers, or when leaving such presses to pass through thedrying rolls. This necessitated the mounting 0 such removing devices atall of the 135 places where needed. l

The present invention has for its principal object the provision of anair jet device, which is portable, thereby-enabling the attendant tomove from place to place, with respectto the machine,

web from the wire, or from the pressing or drying rolls, and properlyguide? the web to that. portion of the machine through as which the webis next to pass.

Another object is to provide a device of this character wherein theoperator can easily control the ilow of air from the jet,

thus permitting him to use the required force to suit the conditions.

Other objects and advantages will be apparent from the followingdescription when taken in connection with the accompanying drmvings.' i

in the drawings:

Figure l is a side elevation of an air et made in accordance with thepresent invenu'o'n.

Figure 2 is a vertical longitudinal central sectional view through thejet. Figure 3 is a plan View of the jet.

Referring psrticularly'to the accompanying drawing, 10 represents asuitable length of pipe, of the required length and diameter.

Que end of the pipe is closed, as shown, while a flanged sleeve ll isfixed in the other )tppllcetlon flied February is, 1921. sans No.168,788.

so that he can quick-' ly and essi v remove the adhering papercasin so.ressing same and permitting air to end of ssid jpipe, saidsleevehavinga bore n5,- rrrcs; P

of slightlyisnialler diameter than the bore of the pipe: of the pipeinwardly of the closure thereof, is a longitudinally extending slot 12,and at a short distapce beyond the outer end of said In one side oi'theother end slot, there is formed a. circular opening- 13 a of .a diameterequal to the width of the sol being connected, with the:

slot, said openin e slot by means of a. naradjacent'end of t rower slot14. .-Propei'ly enga ed flanged end of the sleeve 11 is't e stem'15,

in the of the aircontrolling valve. casing 16. From the other side ofthis casing there extendse I0 suitable nipple for attachment of amend ofa'flexible air conveying hose 17. The valve is-zprovided with ii pivotedhandle 18, which 15 adapted to be depressed by the thumb orfinger oftheoperator, the valve 19 being normally maintained in closed position ba spring 20. The said stem 15 is rovided with a bore of sruall diameter,an in the ppe, inwardly of the inner end of theslot there is disposedafpluglll havingel' small opening therethrough. When the.

handle 18 is depressed,- the valve will be opened to permit-air to.lpass into the pipe 10, by means of thes na 15, such airbeingdischarged through the small opening in the plu tion of'said pipein whicthe slot 12 and opening 13 are formed, and finally esca ing.through said particularly chamber, is formed between t and thestemlfi,and that asimilar, slightly shorter space is block 21 and the closedendof Air pressure entering the first space is slot and opening. It wibe; noted that a" lar a space, or" e. block 2],,

but' formed between the. the tube bore of the stein 21, into theporchecked in its escape "from 1 3 61 slot 12, by. the block- 21, withits small opening,-whereby. the air will accumulato m and issue into thesecond space, throu opening of the bloclgin-e very slim but constant andforceful stream, so thatthe air will be delivered to, and issue fromthe' slot 12, in a steady stream, ofconstant' size and pressure.' V t Inthe operation of the device,.the meninsaid s see,-

the

ant grasps the device just bite]; of the velvofv thuni or fingerto the'handle 18, ior derom the slot 12. Should the paper vveb adhere to thewire,the st-tendantplaces the slotted end of the device close to thewire that he, may easily -epply his quickly 'move from one part of themachine so= that the slot is positioned to direct the Y air beneath thepeperweh, whereby no hit the same from the wire. He then turns thedevice so that the web is held in suspension, and guides the same to thefeit of the first press rolis. Should'the web stick to {he said pressrolls, he can quickly carry the lief, and apply it to this part of themachine, so as 0 release the web. Thus, by reason of the device beingortab1e, the attendent can is another, for the purpose of releasing thestacking web wherever it 15 necessary.

Whahs claimed is:

'. A portable air nozzle for a paper inekin fmschmeeomprising a pipehaving one en JiOSBil and a longitudinal slot in the said closed end, aconduit for compressed air connected to the other end of the pipe, 5;mannaiiy cont-relied valve in said cenduit, and a block within the pipe,intermediate the Closed end and the valve dividing the interior of thepipe into two chambers, said block having aiongihudinal opening of emaildiameter, said block serving to canse the air to accumuiate Within thechamber adjacent the conduit whereby to provide a constant stream of airof even pressure de- V ln'ered to the second chamber and said slot.

In testimony whereof, I afiix signature.

FRANK BEDARD'.

